+ PKG_PATH=/nfs/packages/NetBSD/trunk/x86_64/All /usr/tools/sbin/pkg_add -K /usr/pkg/pkgdb digest-20220214 x11-links-1.35 icoutils-0.32.3nb5 mktools-20220614 cmake-3.24.3 pkgconf-1.8.0 cwrappers-20220403 checkperms-1.12 flac-1.4.2 hicolor-icon-theme-0.17nb1 SDL2-2.24.1nb1
libidn-1.41: registering info file /usr/pkg/info/libidn-components.png
libidn-1.41: registering info file /usr/pkg/info/libidn.info
pkg_add: package `mktools-20220614' already recorded as installed
rhash-1.4.3: copying /usr/pkg/share/examples/rhash/rhashrc to /usr/pkg/etc/rhashrc
libunistring-1.1: registering info file /usr/pkg/info/libunistring.info
libidn2-2.3.4: registering info file /usr/pkg/info/libidn2.info
libffi-3.4.4: registering info file /usr/pkg/info/libffi.info
xmlcatmgr-2.2nb1: copying /usr/pkg/share/examples/xmlcatmgr/catalog.etc.sgml to /usr/pkg/etc/sgml/catalog
xmlcatmgr-2.2nb1: copying /usr/pkg/share/examples/xmlcatmgr/catalog.etc.xml to /usr/pkg/etc/xml/catalog
xmlcatmgr-2.2nb1: copying /usr/pkg/share/examples/xmlcatmgr/catalog.share.sgml to /usr/pkg/share/sgml/catalog
xmlcatmgr-2.2nb1: copying /usr/pkg/share/examples/xmlcatmgr/catalog.share.xml to /usr/pkg/share/xml/catalog
pkg_add: package `cwrappers-20220403' already recorded as installed
fftw-3.3.10nb1: registering info file /usr/pkg/info/fftw3.info
libgpg-error-1.46: registering info file /usr/pkg/info/gpgrt.info
libgcrypt-1.10.1: registering info file /usr/pkg/info/gcrypt.info
===========================================================================
$NetBSD: MESSAGE.NetBSD,v 1.3 2021/09/08 19:19:19 nia Exp $

To start JACK on NetBSD:

$ jackd -Sr -d sun

If you have an external USB mic:

$ jackd -Sr -d sun -P /dev/audio -C /dev/audio1 -i 1

===========================================================================